Hello everybody, my first request on PICLIST ( a nice tool indeed)
NEED :
I try to display characters on a TV Screen.
Details :
I know the wonderful PICDREAM from alain FORT, but the 16F84 is too busy
to receive Characters from outside .
I try to use either a dedicated IC like SAA 5244 or 5246 from Phillips and be
able
to send Characters through a PIC using I2C commands.
But I am not very familiar with SAA command (Videotext Unit) and I have trouble
...

OR .... if you have another solution ...

Application : I have a lot of need like that, first one is to display on TV the
frequency from
a frequency meter (PIC application).

I suggest you have a look at ST-Microelectronics' STV5730A. This chip
is designed for putting text on top of composite video. It is used in
VCR and set top box applications for character generation. It is easy
to interface to a PIC with a simple 3 wire serial interface. Searchhttp://www.st.com for the datasheet.

> Francois,
>
> I suggest you have a look at ST-Microelectronics' STV5730A. This chip
> is designed for putting text on top of composite video. It is used in
> VCR and set top box applications for character generation. It is easy
> to interface to a PIC with a simple 3 wire serial interface. Search
> http://www.st.com for the datasheet.
>
> Kayode.
>
Anyone know of a hobbyist source for these(or any other single
chip OSD)? Mouser only has them as a non-catalog item(minimum
84 pcs). Newark also has a minimum quanity.

In message <.....199912160112.UAA28868KILLspam@spam@elk1.elkhart.net>, Mike DeMetz
<mikedKILLspamELKHART.NET> writes
>> Francois,
>>
>> I suggest you have a look at ST-Microelectronics' STV5730A. This chip
>> is designed for putting text on top of composite video. It is used in
>> VCR and set top box applications for character generation. It is easy
>> to interface to a PIC with a simple 3 wire serial interface. Search
>> http://www.st.com for the datasheet.
>>
>> Kayode.
>>
>Anyone know of a hobbyist source for these(or any other single
>chip OSD)? Mouser only has them as a non-catalog item(minimum
>84 pcs). Newark also has a minimum quanity.

I don't know any specific source, but I presume it is probably used in
currently available equipment (VCR's and camcorders?), you be able to
get them in single quantities through suppliers of spares for the TV/VCR
trade. I used an NEC OSD chip, I got those from UK spares companies,
they were used by both Amstrad (in satellite receivers) and Hitachi (in
VCR's).
--